Crisis in Ukraine

Pro-Russian militant walks past burnt cars near a checkpoint that was the scene of a gunfight overnight near the city of Slaviansk

A Pro-Russian militant walks past burnt cars near a checkpoint that was the scene of a gunfight overnight near the city of Slaviansk, April 20, 2014. At least two people were killed in a gunfight early on Sunday near a Ukrainian city controlled by pro-Russian separatists, testing an already fragile international accord that is supposed to defuse Ukraine's armed stand-off. REUTERS/Gleb Garanich (UKRAINE - Tags: POLITICS MILITARY CIVIL UNREST CRIME LAW TPX IMAGES OF THE DAY)

A deadly gunfight in a town in restive east Ukraine on Sunday shattered a fragile Easter truce, with Russia declaring it was "outraged" at the return to violence in the crisis-hit former Soviet republic.

Three pro-Russian militants and one attacker were killed in a firefight at a roadblock close to the separatist-held town of Slavyansk, said a local pro-Kremlin rebel leader, Vyatcheslav Ponomarev. (AP)